*{
    margin:0;
    padding:0;
}
ul{
    list-style: none;
    display: flex;
    position: fixed;
    bottom: 0px;
    left:0px;
    height: 50px;
    line-height: 50px;
    width: 100%;
    background: white;
}
ul li{
    flex:1;
    text-align: center;
}


.active{
    color:red;
}

dl {
    height: 50px;
    border-bottom: 1px solid gray;
}

dl dt{
    font-size: 20px;
}

dl dd{
    font-size: 12px;
    color:gray;
}

input {
    width: 100%;
    height: 50px;
    line-height: 50px;
    font-size: 30px;
    box-sizing: border-box;
}